296 DISEASES SECT. XXXII. 8. i, 



al caufe of their quiefcence feems to be too great infipidity of 

 the fluids of the body, co-operating perhaps at the fame time 

 with other general caufes of quiefcence. 



Hence, in marfhy countries at cold f-afons, which have fuc- 

 ceedect hot ones, and amongft thofe, who have lived on innutri- 

 tions and untlimulating diet, thefe agues are moil frequent. 

 The enlargement of thefe quiefcent vifcera, and the f welling of 

 the prsecordia in many other fevers, is, mod probably, owing to 

 the fame caufe ; which may confift in a general deficiency of 

 the production of fenforial power, as well as in the diminished 

 ftimulation of the fluids ; and when the quiefcence of fo great 

 a number of glands, as conftitute one of thoie large vifcera, 

 commences, all the other irritative morions are affe&ed by their 

 connexion with it, and the cold fit of fever is produced 



VIII. There are many other caufes, which produce quiefcence 

 of fome part of the animal fyftem, as fatigue, hunger, third, bad 

 diet, difappointed love,unwhoiefome air, exhauition from evacu- 

 ations, and many others ; but the laft caufe, that we fhall men- 

 tion, as frequently productive of cold fits of fever, is fear or 

 anxiety of mind. The pains, which we are firft and moil gen- 

 erally acquainted with, have been produced by defect of fome 

 ftimulus ; thus, foon after our nativity we become acquainted 

 with the pain from the coldnefs of the air, from the want of 

 refpiration, and from the want of food. Now all thefe pains 

 occafioned by defect of (tirnulus are attended with quiefcence of 

 the organ, and at the fame time with a greater or lefs degree of 

 quiefcence of other parts of the fyftem : thus, if we even en- 

 dure the pain of hunger fo as to mifs one meal inftead of our 

 daily habit of repletion, not only the periftaltic motions of the 

 flomach and bowels are diminifhed, but we are more liable to 

 coldnefs of our extremities, as of our nofes, and ears, and feet, 

 than at other times. 



Now, as fear is originally excited by our having experienced 

 pain, and is itfelf a painful affection, the fame quirfcence of 

 other fibrous motions accompanies it, as has been molt frequent- 

 ly connected with this kind of pain, as explained in Seel:. XVI. 

 8. I. as the coldnefs and palenefs of the fkin, trembling, difficult 

 refpiration, indigeftion, and other fymptoms, which contribute 

 to form the cold fit of fevers. Anxiety is fear continued through 

 a longer time, and, by producing chronical torpor of the fyftem, 

 extinguifhes life flowly, by what is commonly termed a brokea 

 heart. 



IX. i. We now ftep forwards to confider the other fymp- 

 toms in con fequence of the quiefcence which begins the fits of 

 feyer. If by any of the circumftances before deicribed, or bf 



two 



